Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations
Plantations play a vital role in the global nutrient cycle because they have large stocks of soil macronutrients. However, the impacts of plantations on soil macronutrient stocks combined with stand age and soil physicochemical properties have not been well quantified. We compared soil macronutrient...
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MDPI AG
2021-12-01
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| author | Jie He Quanhou Dai Fengwei Xu Youjin Yan Xudong Peng |
| author_facet | Jie He Quanhou Dai Fengwei Xu Youjin Yan Xudong Peng |
| author_sort | Jie He |
| collection | DOAJ |
| description | Plantations play a vital role in the global nutrient cycle because they have large stocks of soil macronutrients. However, the impacts of plantations on soil macronutrient stocks combined with stand age and soil physicochemical properties have not been well quantified. We compared soil macronutrient stocks at soil depths of 0−20 and 20−40 cm across a 7-, 14-, 25-, and 30-year chronosequence of Masson pine (<i>Pinus massoniana</i> Lamb.) plantations. The results showed that the nitrogen (N), phosphorus (P), and potassium (K) stocks first increased and then decreased with stand age. The highest N and P stocks were observed in the 14-year-old plantation, and the 25-year-old plantation displayed the highest K stock. The C, N, and P stocks declined with increasing soil depth across all sites, whereas the reverse trend was found in the K stock. Carbon stocks were highest for all plantations, followed by the K, N, and P stocks. Plantation soils exhibited a higher C:P ratio and a lower P:K ratio at various soil depths. The dominant controlling factors for the soil macronutrient stocks varied significantly at different stand ages and soil depths according to statistical analysis. For the total soil system, the C stock was affected by the available nutrients, organic matter, and stoichiometry; the available nutrients and organic matter were the determinant factors of the N and P stocks. Aggregate stability could be the primary parameter affecting the K stock. Organic matter explained most of the variation in soil macronutrient stocks, followed by the P:K ratio and available K. Collectively, our results suggest that the response of soil macronutrient stocks to stand age and soil depth will be dependent on different soil physicochemical properties, and P and K may be important limiting factors in Masson pine plantation ecosystems. |
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| institution | Directory Open Access Journal |
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| language | English |
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| publishDate | 2021-12-01 |
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| series | Forests |
| spelling | doaj.art-ba9dfa955f1443d5a0e4d487bb5851fe2023-11-23T13:46:26ZengMDPI AGForests1999-49072021-12-011311710.3390/f13010017Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine PlantationsJie He0Quanhou Dai1Fengwei Xu2Youjin Yan3Xudong Peng4College of Forestry, Guizhou University, Guiyang 550025, ChinaCollege of Forestry, Guizhou University, Guiyang 550025, ChinaCollege of Forestry, Guizhou University, Guiyang 550025, ChinaCollege of Forestry, Guizhou University, Guiyang 550025, ChinaCollege of Forestry, Guizhou University, Guiyang 550025, ChinaPlantations play a vital role in the global nutrient cycle because they have large stocks of soil macronutrients. However, the impacts of plantations on soil macronutrient stocks combined with stand age and soil physicochemical properties have not been well quantified. We compared soil macronutrient stocks at soil depths of 0−20 and 20−40 cm across a 7-, 14-, 25-, and 30-year chronosequence of Masson pine (<i>Pinus massoniana</i> Lamb.) plantations. The results showed that the nitrogen (N), phosphorus (P), and potassium (K) stocks first increased and then decreased with stand age. The highest N and P stocks were observed in the 14-year-old plantation, and the 25-year-old plantation displayed the highest K stock. The C, N, and P stocks declined with increasing soil depth across all sites, whereas the reverse trend was found in the K stock. Carbon stocks were highest for all plantations, followed by the K, N, and P stocks. Plantation soils exhibited a higher C:P ratio and a lower P:K ratio at various soil depths. The dominant controlling factors for the soil macronutrient stocks varied significantly at different stand ages and soil depths according to statistical analysis. For the total soil system, the C stock was affected by the available nutrients, organic matter, and stoichiometry; the available nutrients and organic matter were the determinant factors of the N and P stocks. Aggregate stability could be the primary parameter affecting the K stock. Organic matter explained most of the variation in soil macronutrient stocks, followed by the P:K ratio and available K. Collectively, our results suggest that the response of soil macronutrient stocks to stand age and soil depth will be dependent on different soil physicochemical properties, and P and K may be important limiting factors in Masson pine plantation ecosystems.https://www.mdpi.com/1999-4907/13/1/17soil macronutrient stocksMasson pine plantationscontrolling factorschronosequence |
| spellingShingle | Jie He Quanhou Dai Fengwei Xu Youjin Yan Xudong Peng Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations Forests soil macronutrient stocks Masson pine plantations controlling factors chronosequence |
| title | Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations |
| title_full | Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations |
| title_fullStr | Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations |
| title_full_unstemmed | Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations |
| title_short | Variability in Soil Macronutrient Stocks across a Chronosequence of Masson Pine Plantations |
| title_sort | variability in soil macronutrient stocks across a chronosequence of masson pine plantations |
| topic | soil macronutrient stocks Masson pine plantations controlling factors chronosequence |
| url | https://www.mdpi.com/1999-4907/13/1/17 |
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